Adding option for Proguard jar to be switched.

components/cronet/android/BUILD.gn

 # Copyright 2015 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/buildflag_header.gni")
 import("//build/config/android/config.gni")
 import("//build/config/android/rules.gni")
 import("//build/util/version.gni")
 import("//chrome/version.gni")
 import("//testing/test.gni")
@@ skipping 324 matching lines @@
 
   deps = [
     ":cronet",
     ":cronet_sample_apk_java",
     ":cronet_sample_apk_resources",
     "//base:base_java",
     "//third_party/jsr-305:jsr_305_javalib",
   ]
 
   run_findbugs_override = true
-  if (!is_debug) {
+  if (!is_java_debug) {
     proguard_enabled = true
     proguard_configs = [
       "proguard.cfg",
       "sample/javatests/proguard.cfg",
     ]
   }
 }
 
 # cronet_sample_test_apk_resources is identical to
 # cronet_sample_apk_resources. The two have to be different targets because
@@ skipping 18 matching lines @@
     ":cronet_java",
     ":cronet_sample_apk_java",
     ":cronet_sample_test_apk_resources",
     "//base:base_java",
     "//base:base_java_test_support",
     "//net/android:net_java_test_support",
   ]
   additional_apks = [ "//net/android:net_test_support_apk" ]
 
   run_findbugs_override = true
-  proguard_enabled = !is_debug
+  proguard_enabled = !is_java_debug
 }
 
 generate_jni("cronet_tests_jni_headers") {
   testonly = true
   sources = [
     "test/javatests/src/org/chromium/net/CronetUrlRequestContextTest.java",
     "test/src/org/chromium/net/CronetTestUtil.java",
     "test/src/org/chromium/net/MockCertVerifier.java",
     "test/src/org/chromium/net/MockUrlRequestJobFactory.java",
     "test/src/org/chromium/net/NativeTestServer.java",
@@ skipping 476 matching lines @@
     ":cronet_package_copy_native_lib",
     ":cronet_package_copy_native_lib_unstripped",
     ":generate_javadoc",
     ":generate_licenses",
     ":jar_cronet_api_source",
     ":jar_cronet_other_source",
     ":jar_cronet_sample_source",
     ":repackage_extracted_jars",
   ]
 }